Hodgdon H4350 is a medium-slow burning, single-base extruded rifle propellant that stands as the definitive benchmark for temperature-stable performance in the modern reloading era. As a flagship member of the acclaimed Hodgdon Extreme series, Hodgdon H4350 has earned a legendary reputation among precision rifle competitors and big game hunters for its unwavering consistency across the most demanding environmental conditions. Originally popularized for classic long-action hunting cartridges, the modernization of its grain structure has made Hodgdon H4350 the primary choice for contemporary precision rounds like the 6.5 Creedmoor and the Winchester Short Magnum (WSM) family.
Executive Summary
- Main Application: Optimized for medium to large-capacity rifle cartridges, specifically those in the “overbore” category and modern precision short-action rounds.
- Key Advantage: Industry-leading temperature insensitivity, ensuring point-of-impact remains consistent from -40 to +120 degrees Fahrenheit.
- Burn Rate: Medium-slow, serving as the central standard for the versatile “4350” burn rate classification.
- What This Guide Covers: Detailed analysis of Extreme series technology, comprehensive technical specifications, comparative performance against competitors, and optimized loading data.
Best For: Long-range precision competitors and mountain hunters who require absolute velocity stability across extreme seasonal temperature shifts.
Powder Description & Technical Profile
Hodgdon H4350 is a single-base propellant manufactured in Australia by Thales (ADI) under rigorous quality-control standards. Unlike traditional extruded powders that utilize long, “log-like” sticks, Hodgdon H4350 features a modernized “short-cut” grain geometry. This structural refinement allows the powder to flow smoothly through mechanical powder measures with significantly less “crunching” or “shearing,” leading to more uniform charge weights and reduced standard deviations in high-volume reloading environments.
The expert “feel” of Hodgdon H4350 is characterized by its high energy density and clean-burning properties. Because it is a single-base powder, it produces minimal residue, allowing for extended shooting strings between barrel cleanings—a critical factor for PRS (Precision Rifle Series) shooters who may fire dozens of rounds in a single match session. In the chamber, Hodgdon H4350 provides a progressive pressure curve that maximizes muzzle velocity while maintaining a linear relationship between charge weight and pressure.
Pros & Cons
- Pro: Exceptional temperature stability, maintaining nearly identical velocities in summer heat and winter cold.
- Pro: Shortened grains provide superior metering accuracy in both manual and automated dispensers.
- Pro: Extremely versatile across a massive range of calibers, from 22 Creedmoor to 375 H&H.
- Con: High market demand often leads to limited availability during peak hunting and competition seasons.
- Con: Single-base formulation may produce slightly lower peak velocities in some magnums compared to high-energy double-base spherical powders.
Technical Characteristics
The physical properties of Hodgdon H4350 are engineered to optimize case fill and ignition consistency. Its bulk density is specifically tuned to provide high loading density in the most popular mid-sized cases.
| Property | Specification |
| Manufacturer | Hodgdon Powder Company (Manufactured by ADI/Thales) |
| Powder Type | Single-Base Extruded (Short-Cut) |
| Bulk Density | 56.19 lbs/ft3 (approx. 0.900-0.915 g/cc) |
| Relative Burn Rate | 1.4 (Medium-Slow) |
| Grain Type | Modernized Short-Stick |
| Primary Use | Standard and Magnum Rifle Cartridges |
Burn Rate and Temperature Stability
Hodgdon H4350 is the cornerstone of the “Extreme” line, utilizing a specialized chemical coating that resists the effects of ambient temperature. While most standard powders exhibit significant velocity shifts as temperatures rise or fall, Hodgdon H4350 typically averages only 0.14-0.5 FPS variation per degree of temperature change. For a long-range shooter, this means that a load developed at a 70-degree range will still be on target during a 20-degree late-season hunt.
This stability is not merely a marketing claim; it is the primary reason why 88% of professional precision rifle shooters utilize Hodgdon Extreme series powders. In high-stakes matches where targets are engaged at 1000 yards or further, even a 30-50 FPS shift in velocity can result in a complete miss due to vertical stringing. Hodgdon H4350 eliminates this variable, allowing the shooter to focus entirely on windage and fundamentals.
Stability Table
| Powder | Stability Rating | Typical FPS Variation |
| Hodgdon H4350 | Ultra-High (Extreme Series) | 0.14-0.5 FPS / Degree |
| IMR 4350 | Moderate/Standard | 1.5-2.0 FPS / Degree |
| Accurate 2700 | Standard (Spherical) | 1.2-1.8 FPS / Degree |
Powder Comparison
Choosing between the various 4350-class powders is a common dilemma for reloaders. Hodgdon H4350 is widely regarded as the premium option for those prioritizing environmental consistency.
4-Way Analysis
- IMR 4350: The traditional “sister” powder. While IMR often produces slightly higher velocities in certain rifles, it lacks the temperature stability and shortened grain structure of Hodgdon H4350.
- Accurate 4350: Another short-cut extruded option. It meters similarly to the Hodgdon version but is generally more sensitive to heat and cold, making it better suited for range use than extreme-environment hunting.
- Alliant Reloder 16: A modern competitor that also boasts high temperature stability. Some shooters find Alliant Reloder 16 produces higher velocities in the 6.5 Creedmoor, though Hodgdon H4350 remains the gold standard for batch-to-batch consistency.
- Winchester 760: A spherical powder in the same burn range. It meters perfectly but is significantly more temperature-sensitive and can lead to pressure spikes in hot weather.
Comparison Table
| Powder | Burn Rate | Grain Type | Primary Cartridges |
| Hodgdon H4350 | Medium-Slow | Short-Cut Stick | 6.5 Creedmoor, 30-06 |
| IMR 4350 | Medium-Slow | Long Stick | 243 Winchester, 30-06 |
| Accurate 4350 | Medium-Slow | Short-Cut Stick | 270 Winchester, 300 WSM |
| Hodgdon Varget | Medium | Short-Cut Stick | 223 Remington, 308 Winchester |
| Alliant Reloder 17 | Medium-Slow | Stick (TZ Tech) | 6.5 PRC, 300 WSM |
Applications and Performance
Hodgdon H4350 is celebrated for its “magical” performance in the 6.5 Creedmoor, where it provides nearly 100% case fill with 140-147 grain bullets. This high loading density is vital for consistent ignition; it prevents the powder from shifting within the case, which can otherwise cause erratic velocity spreads. In hunting rifles like the 270 Winchester and 30-06 Springfield, Hodgdon H4350 is a “load and forget” powder, providing ethical one-shot performance regardless of whether the hunt takes place in the Georgia humidity or the Alaskan tundra.
For high-volume competitors, the clean-burning nature of the ADI-manufactured propellant is a major asset. It minimizes copper and carbon fouling, allowing barrels to maintain their accuracy over 100-round match weekends without requiring a mid-day cleaning.
Recommended Cartridges and Applications
| Cartridge | Primary Application |
| 243 Winchester | Optimal for driving 90-105 grain bullets to high velocities. |
| 25-06 Remington | Exceptional performance with 100-115 grain hunting projectiles. |
| 6.5 Creedmoor | The standard-bearer powder for precision long-range match loads. |
| 270 Winchester | Ideal for 130-150 grain bullets in standard hunting configurations. |
| 30-06 Springfield | Provides consistent pressure and velocity for 165-180 grain bullets. |
| 300 Winchester Magnum | Effective as a “target” propellant for lighter 150-168 grain bullets. |
| 338 Winchester Magnum | Reliable performance for heavy-hitting big game hunting loads. |
Bullets
Hodgdon H4350 excels when paired with bullets that have high ballistic coefficients (BC), as its stable velocities allow those bullets to realize their full aerodynamic potential.
| Brand/Model | Weight Range | Application |
| Nosler Partition | 140-180 Grains | Controlled expansion for heavy-bodied game. |
| Hornady SST | 117-150 Grains | Rapid expansion for deer and medium-sized game. |
| Sierra GameKing | 100-165 Grains | Long-range hunting with reliable terminal performance. |
| Barnes TSX | 100-150 Grains | Lead-free precision with nearly 100% weight retention. |
| Berger Hybrid Target | 105-144 Grains | Extreme precision for long-range competitive shooting. |
Primers
Because Hodgdon H4350 is a single-base powder, it is easily ignited; however, precision shooters often select primers based on cup hardness and the specific needs of their cartridge case.
| Model | Type | Best Application |
| CCI 200 | Large Rifle | All-around hunting and target loads in 30-06. |
| Federal 210M | Large Rifle Match | The standard for consistent ignition in precision 6.5 Creedmoor. |
| Winchester WLR | Large Rifle | Reliable all-weather performance for standard hunting loads. |
| CCI BR2 | Large Rifle Benchrest | Highest level of consistency for competitive target shooting. |
| Remington 9-1/2 | Large Rifle | Consistent ignition across a wide range of standard long-action cases. |
| Federal 215 | Large Rifle Magnum | Recommended for charges exceeding 60 grains or in extreme cold. |
| CCI 250 | Large Rifle Magnum | Reliable ignition for magnum cases and large powder columns. |
| RWS 5333 | Large Rifle Magnum | Premium international choice for magnum consistency in varying climates. |
| Fiocchi Large Rifle | Large Rifle | Reliable and cost-effective choice for high-volume practice loads. |
Conclusion and Expert Verdict
Hodgdon H4350 remains the “Gold Standard” for a reason: it delivers what every shooter desires most—predictability. Whether you are a competitive shooter needing to hit a 10 inch plate at a mile or a hunter taking the shot of a lifetime in sub-zero temperatures, Hodgdon H4350 removes the uncertainty of environmental conditions. Its modernized grain structure and incredible temperature stability make it perhaps the most important powder in the modern reloading landscape.
Expert Pro Tip: When loading Hodgdon H4350 in precision cartridges like the 6.5 Creedmoor, do not be afraid to reach 100% case fill. Many rifles find their most accurate “node” at or near a slightly compressed charge, where the internal ballistics are the most consistent. If you hear a slight “crunch” when seating the bullet, ensure your neck tension is uniform to avoid excessive runout, as this high fill ratio often yields the lowest extreme spreads (ES).
